24
type
C12
type
C32
type
C42
type
C52
type
C82
3.2.7.1. Configuration of air/flue system pipes:
types: B22, C12, C32, C42, C52, C82
B22 This boiler is intended for connection to an
existing flue system either inside or outside the
boiler room. Combustion air is drawn straight from
the boiler room itself and flue gas is conveyed to
the outside.
The boiler must not be fitted with an anti-wind
gust system; it must be equipped with a fan moun-
ted after the combustion chamber.
C12 This boiler is intended for connection to
horizontal flue gas and air-intake pipes con-
nected to the outside by means of coaxial or split
pipes.
The distance between the air intake pipe and the
flue gas pipe must be at least 250 mm and both
terminals must be positioned in a 500mm-side
square area.
C32 This boiler is intended for connection to
vertical flue gas and air-intake pipes connected
to the outside by means of coaxial or split pipes.
The distance between the air intake pipe and the
flue gas pipe must be at least 250 mm and both
terminals must be positioned in a 500mm-side
square area.
C42 This boiler is intended for connection to a
common chimney pipe system that includes two
pipes, one for the air intake and the other for flue
gas discharge.
These pipes may be coaxial or split.
The flue gas chimney system must comply with
current standards.
C52 Boiler with separate pipes for air intake
and flue gas.
Air and flue gas may have different discharge
pressures. Air and flue gas terminals must not
face each other from opposite walls.
type
B22
C82 This boiler is intended to be connected
to a combustion air-intake terminal and to a
single flue gas terminal or to a common chim-
ney.
The flue gas chimney system must comply
with current standards.
